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Description
SAE J1939 ECU Simulator Board With USB PortThe jCOM. J1939. USB gateway board is a high performance, low latency vehicle network adapter for SAE J1939 applications. It allows any host device with a USB COM port to monitor SAE J1939 data traffic and communicate with the SAE J1939 vehicle network. The board supports the full SAE J1939 protocol according to J1939 81 Network Management (Address Claiming) and J1939 21 Transport Protocol (TP). It is also supported by an extensive programming
The jCOM.J1939.USB gateway board is a high-performance, low-latency vehicle network adapter for SAE J1939 applications. It allows any host device with a USB COM port to monitor SAE J1939 data traffic and communicate with the SAE J1939 vehicle network.
The board supports the full SAE J1939 protocol according to J1939/81 Network Management (Address Claiming) and J1939/21 Transport Protocol (TP). It is also supported by an extensive programming interface for Windows and Linux/Ubuntu applications, including full C/C++/C# source code for short time-to-market developments.
The strength of the board lies in the fact that the entire SAE J1939 protocol, including all timing requirements, is stored on-chip, thus taking the burden off the main system. The board uses a USB COM port to communicate with the main system, i.e. all data transfer is handled through a standard COM port access. The communication protocol between the board and the main system is well documented and thus allows a porting to any computer system with a USB connection. Working source code libraries exist for Windows (C# under Visual Studio 2102/2013), Linux and its derivatives (C++ using Code::Blocks), and Raspberry Pi (C using the standard gcc compiler).
With all its features, the jCOM.J1939.USB allows the simulation of an SAE J1939 ECU (Electronic Control Unit) using embedded solutions such as the Raspberry Pi, BeagleBone, Arduino, Teensy, and others but also PCs running Windows or Linux (incl. Ubuntu, Fedora, etc.).
Board Components
jCOM.J1939.USB General Features
- Full SAE J1939 Protocol on chip
- Virtually OS independent
- Easily adaptable; just access the COM port
- Works with PCs, Raspberry Pi, BeagleBone, Teensy, Arduino
- Protocol is well documented
- C source code available
- Windows tool: jCOM1939 Monitor
- Power applied through USB port
- Power consumption 0.486 W - 0.097A @ 5VDC
- (Average; changes with CAN bus load)
- Operating Range: -40...+85 C
- Board dimensions (W x L ): 52 x 78 ; 2.05" x 3.07"
Supported SAE J1939 Features Include
- Hardware is fully SAE J1939/1x compliant
- Switchable termination resistor
- SAE J1939/21 - Data Link Layer
- SAE J1939/81 - Network Management
- Setup of Preferred Node Address
- Adjustable Node Address Negotiation Range
- Message Filters
- Full Network Communication incl. Transport Protocol
- Design Tx Messages Incl. Transmission Rate
- Configuration of Request Responses
- Configuration of Request Messages
- Network Scanner (Creates a list of all nodes in the network)
Documents
Driver Software
The USB driver software supports a variety of operating systems as shown below. Most operating systems, such as Windows or Linux, will recognize the USB port and install the appropriate driver automatically. However, should that not be the case, please download the driver for your operating system as indicated below:
Free-Of-Charge Windows Software
The communication protocol between the gateway and the host system (PC, Embedded System, Android System, etc.) is well documented, and we provide C/C# source code to read and write CAN data frames (for more information, see our wiki page).
In addition, the gateway is supported by our free-of-charge jCOM1939 Monitor, an SAE J1939 Monitoring, Analyzer and ECU Simulation software under Windows.
Our JCOM1939 Monitor Software for Windows is a complete tool to monitor, analyze, record, and simulate SAE J1939 data traffic. It works in combination with our SAE J1939-USB gateways. The monitor software represents a comprehensive and easy-to-use, easy-to-understand tool that displays not only SAE J1939 data traffic; it also allows scanning the network, simulating an ECU (incl. full node address negotiation features), and responding to data request messages.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.3 ★★★★★
Based on 28 reviews
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Product Reviews
★★★★★ 4
A Frother that Won't Turn Off? Great Service. Lost Package. Great Hot Chocolate. Worth It!
Color: Black, Size: Z1 Motor + Batteries
I saw this item (or one similar) on an Alton Brown short video. He recommended a frother and I thought "what the heck? If AB recommends a uni-tasker, it must be something good."
The item came in, loaded with batteries and all. I removed the plastic tab that interrupts the power and the unit kicked on. I wasn't pressing anything. It just started and would not stop.
To return the item is not worth the time or money, especially since none of the "free return" options are anywhere close to me.
Called the company and told them what had happened. I spoke with a very nice woman and after I described what happened, her response was not faux sympathy, but "that shouldn't have happened. We'll make it right."
She offered not only to replace the unit, but send a second one free of charge. When I declined the second one, she said "take it for your troubles. Give it to a friend if you want."
The order was sent out. Tracking via USPS was sent.
The package was supposed to be delivered on a Friday, which was great as we were supposed to get cold temps and snow. I was anticipating making frothy hot chocolate.
Suddenly the tracking showed the package being delivered. It was not. You cannot ask the USPS to find a package for 7 days and my local post office doesn't answer the phone.
Disappointed, I started to make dinner and looked out the window and I could see my postal carrier's truck a block away.
I waddled over to the truck and talked to her. She said "I know where it is."
She had delivered it 3 blocks away. Same house number, but different street.
She went and found the package, brought it to me and Bob's your uncle.
That night I made hot chocolate and used the frother.
I was surprised that the long shaft did not vibrate or waiver. It stays true. The speed is fast, but not overly so.
The thing made a difference. It seemed to make the hot chocolate "lighter" and smoother. I threw a piece of chocolate in the mug, waited a little and then frothed again using the frother.
No issues with the frother.
I now had frothy, really chocolate-ly hot chocolate. For kicks and on the advice of a friend, I added a tablespoon of peppermint schnapps and used the frother again.
Best hot chocolate from a mix I ever had.
The frother worked better than advertised.
Woo Hoo!!
Because the first one didn't work, I have to knock a star off of the rating for the product. But the customer service and actual accountability of the women with whom I spoke is refreshing in the world of product support and customer service.
The item is really good and would recommend whole heartedly.
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Reviewed in the United States on January 11, 2026
★★★★★ 5
Worth it!
Color: Absolute Black, Size: Z1 Motor + Batteries
It works great! Makes a big difference and my coffee is better! Easy to use and clean. The stand is perfect to keep it accessible. Only thing I would warn customers is to pay attention to instructions on how to insert batteries.
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Reviewed in the United States on May 18, 2026
★★★★★ 5
High Quality and Surprisingly Powerful
Color: Absolute Black, Size: Z1 Motor + Batteries
The Pros:
Unexpected Power: I usually know exactly what to expect with the products I order, but this unit really blew me away. It is surprisingly powerful and handles everything much better than I anticipated.
Premium Batteries Included: It was a great surprise to find that it came with Duracell batteries. Seeing a name-brand battery included really speaks to the overall quality of the product and shows they aren't cutting corners.
Solid Build: From the moment I set it up, the unit felt sturdy and well-constructed. It is rare to be this genuinely pleased with a purchase right out of the box.
The Cons:
Operating Noise: Because the motor is so powerful, it does produce a bit more noise than some weaker units. It isn't a dealbreaker, but it is noticeable during extended use.
Bottom Line:
This is a high-quality product that exceeded my expectations in both performance and presentation. The fact that it comes ready to go with reliable batteries is a huge plus. I am very pleased with this purchase.
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Reviewed in the United States on May 12, 2026
★★★★★ 5
Pleasantly surprised.
Color: Absolute Black, Size: Z1 Motor + Batteries
Honestly, I bought this because it was on sale and I needed to add something to my cart to get one day free shipping. I had zero expectations and thought I'd use it when I travel and won't have access to my espresso machine but I'm blown away by what it can accomplish in its small form factor. It took 30s to froth the milk and it was well-incorporated into the milk, not with just foam on top and milk at the bottom. I could have the frothed milk all day. It's easier to clean than the steam wand and it does plant-based milk cold foam!! It blows the Ikea one out of the water for about the same price point. Glad I stumbled into it!
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Reviewed in the United States on May 26, 2026
★★★★★ 4
Works great for daily use, just be prepared to replace batteries
Color: Absolute Black, Size: Z1 Motor + Batteries
I use this every morning to mix protein powder into my coffee, and it works well. It is quick, easy to use, and does a great job blending everything smoothly without clumps.
For the price, it’s a great little tool and has definitely been worth it for daily use.
The only downside is that I do have to replace the batteries fairly often, about every 3–4 weeks with regular use.
Overall, it’s a very convenient and effective frother, especially for the cost. I would recommend it, just keep extra batteries on hand if you plan to use it daily.
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Reviewed in the United States on June 9, 2026